Home / HISTORICAL WATER POWER ENGINEERING. 13
Creation date / 2017 / All / 6
- Governor Definitions.
- Governor Definitions copied from Irl C. Martins history files.
- Woodward Governor Company's shop order #1845, circa 1909.
- A vintage Water Wheel Manufacturing History Project.
- JAMES LEFFEL LETTERHEAD, CIRCA 1944.
- JAMES LEFFEL LETTERHEAD, CIRCA 1944.
- THE JAMES LEFFEL COMPANY, CIRCA 1944.
- Elmer E. Woodward's state-of-the-art oil pressure relay valve water wheel governor patented in 1912.
- Data from Water Power Engineering, circa 1908.
- Data from Water Power Engineering, circa 1908.
- Elmer E. Woodward's state-of-the-art mechanical compensating type water wheel governor.
- Elmer E. Woodward's new water wheel governor from three patents.
- Another vintage Elmer Woodward ad from 1905.